bezanson



Sept. l0, 1929. G. Bl-:zANsoN STEAM TRAP Filed Feb. 21, 1928 2 Sheets-Sheet xl a wwwwHN m NN :Q Q Q \m\ Q w :1L Q @www EN@ Q 4 nd f a a n Q W M @j -EQ Sept. 10, 1929n G. BEZANSONv STEAM TRAP Filed Feb. 21, 1928 2 sheets-sheet 2 -Uve/ Zoff GSO Patented Sept. 10, 1929.

UNITED STATES PATENT OFFCE.

GEORGE BEZANSON, OF WINCI-IESTER, MASSACHUSETTS, ASSIGNOR TO JULIAN DESTE CO., OF BOSTON, MASSACHUSETTS, A CORPORATION F MAINE.

STEAM TRAP.

Application led February 21, 1928.

This invention relates to an improved steam trap which may be utilized for returning the condensed. steam of a steam heating system to the boiler. It also may be employed for forcing water supplied thereto from` any source into a boiler or into a container positioned either above, or below the trap, or to any discharge pipe for conveying the water to any desired location.

The object of the invention is to provide a steam trap of the character set forth, which is simple and eliicient in its operation and has very few moving parts which cause friction to interfere with the easy operation of the float which is provided in the trap such as tight fitting steam pistons, or packed trunnions and packed joints.

One of the novel features of the invention consists in a valve for supplying steam to the steam trap and a valve for allowing steam or air to pass out of the steam trap, both of the valves being operated by fluid under pressure, such as water from the city main, said fluid being admitted to the steam and air valves simultaneously, or cut off therefrom by `a valve which is operated by the float.

The invention further consists in certain details of construction whereby the efficient and easy operation of the apparatus is insured.

The invention finally consists in the combination and arrangement of parts set forth in the following specification and particularly pointed out in the claims thereof.

Referring to the drawings:

Figure 1 is a vertical sectional elevation of my improved steam trap.

2 is a side elevation as viewed from the left of Fig. 1. f

Fig. 8 is a sectional elevation taken on line 8--8 of Fig. 2 viewed in the direction of the arrows thereon.

Fig. 4 is a sectional elevation taken on line 4-4 of Fig. 1 illustrating the rock shaft for the float and the parts operating in connection therewith.

Fig. 5 is a sectional elevation of the air valve.

Like numerals refer to like parts throughout the several views of the drawings,

Serial No. 256,048.

In the drawings, 10 is a steam trap, 11 the casing thereof, 12 a chamber contained within the casing, and 18 is a head fastened by screws 14 to the body portion of the casing. 15 is the steam valve consisting of a body portion 16 having an inner chamber 17 and an outer chamber 18 with a valve seat 19 interposed therebetween in contact withwhich a valve member 20 is held by means of a spring 21, one end of which bears against the valve member 20, the other end of which bears against a cap 22 having screw-threaded connection at 28 with the body portion 16. The valve member 20 is connected by a valve stem 24 to a diaphragm 25 which is clamped to a standard 26 by a cap 27 and bolts 28.

Steam enters the outer chamber 18 of the steam valve 15 through a pipe 29 and passes from said outer chamber 18 to the inner chamber 17, and thence through a pipe 8O into a passage 81 which entends through the cap 18 forming a portion of the casing 11 into the upper portion of said casing, the passage emerging into the chamber 12 at the top thereof. A baiiie 82 projecting downwardly from the top of the casing in alignment with the outlet end of the passage 81 directs the steam downwardly in the chamber 12 when it emerges from the passage 81. The valve stem 24 is slidably mounted in a bushing 88 which has screw-threaded engagement with a sleeve 84, the sleeve 84 havingscrewthreaded engagement with the bottom 85 of the standard 26 and being locked thereto by a lock nut 86e A vent valve 87 illustrated in detail in Fig. 5 consists of a body portion 88 and a cap 89. A diaphragm 40 is clamped between the body portion 88 and the cap 89 and has fastened to it a needle member 41, the pointed end 42 of which enters a port 48 in the body portion of the valve. Normally the pointed end of the needle valve is held out of engagement with the seat 44 of the valve by a .spring 45 which encircles the needle member and bears at yone end against the body portion 88 and at the other end against a washer `46, which bears against the diaphragm 40.

Steam and air enter the valve through a passage 47 and pass out of the same through a passage 48 and pipe 49 to the atmosphere. It will thus be seen that the steam valve is closed by the spring 21 and that the vent valve is opened by the spring rl`he stem 50 of the vent valve has screw-threaded connection with the body portion 16 of the steam valve, and the passage 47 opens into the inner chamber 17 of the steam valve which is connected to the pipe 8O which opens into the passage 31, and thus connects the inner chamber 17 and the vent valve passage 47 with the chamber 12 of the trap casing.

The vent valve 41 is closed and the steam valve is opened by fluid, such as water, under pressure and this fluid is simultaneously admitted to both of the valves. The steam valve 15 has a pipe 51 opening into a chamber 52 within the cap 27 and this pipe 51 is connected to a valve 58 by connections and 55, a 'T 56 and other connections 57 and 58. rlhe 'l' 56 is connected by a nipple 59 to the vent valve cap 89L and opens into a chamber o() on the opposite side of the diaphragm from that where the spring is located in said vent valve.

The valve 58 consists of a body portion having water passages 68 and 64 out of alignment with each other, and between these passages is interposed a slide valve which is slidably mounted in the body portion 62 and has a port 66 therein. The slide valve has a stem 67 provided with an extension 68, the extension 68 having?r a slot 69 therein into which a pin 70 projects. Tie pin 7 O is fast to an arm 71 and projects laterally therefrom into the slot 69. An arm 83 is mounted upon a roel: shaft 72 and is prevented from rocking on said shaft by a squared portion 73 of the shaft which projects through the hub 7 4 of said rocker arm 88. The rock shaft- 7 2 has a bearing one end in a bushing` 75 which has screw-threaded engagen'lcnt with one side 76 ofthe casing'11of the trap. lnthis bushing there a springY 77 provided, end of which bears againstone end of the shaft 72, the other end of which bears against the closed end 78 of the bus ring 75.

The opposite end of the roel: shaft 72 is supported in a bearing 79 which constitutes a bushingand has screw-threaded engagement with the side 8O of the casing 11. The rock shaft 72 is provided with a shoulder 81 which bears against a washer 82 of composition `naterial of soft metal and is held thereapainst by the action of the spring; 77 which forces the roclr shaft toward the right, Fig. 4, thus brinpjng` the shoulder 81 against the soft metal washer 82, which is positioned in a chamber 83 provided in the bearing 79. The washer 82 is held in position within the bearing also by a sleeve 84 which has screwthreaded engagement with the bearing 79. To the extreme outer end of the rocl shaft 72 there is fastened the arm 71 which is clamped to the roel; shaft by a 131111,86 having screw-threaded engagement with the rock shaft 7 2.

A screw 87 in the extension 68 of the valve stem 67 limits the distance to which the pin 70 can move upwardly in the slot 69. A float 88 is fast to the arm 83 within the casing,T 11. The arm 83, shaft 72, arm 71 and pin 7 0 constitute, as a whole, a rocher member. vWater under pressure from the city main enters the valve 61 through a pipe 89 in alignment with the passage 68. The casing' 11 of the trap is provided with an inlet orilice 90 and with a discharge pipe 91.

ylhe general operation of the invention hereinbefore specifically described is as follows `Water condensation or water from any source enters the chamber 12 of the casing 11 at the inlet orifice 90. As the water accumulates in the casing` 11, the float 88 moves upwardly.

his causes the roclr shaft 72 to be rocked through the arm 88 and the rocking of the roclr shaft 72 causes the arm 71 to be rocked downwardly, thus moving the pin 70 downwardly along; the slot 69 until it arrives at the bottom of said slot, whereupon the valve stem extension 68 and the valve stem 67 will be moved downwardly, causing` the port 66 of the valve 65 to be brought into alignment with the passage 63 as well as the passage 64, and the water entering under pressure through the pipe 89 will then pass through the valve 58 and through the connections 58, 57, 'l' 56 and connections 55, 54 and 51 into the chamber 52 of the steam valve, and there pressing against the diaphragm 25, will push the valve stein 24 and valve member 2O downwardly, opening` the passage 92 between the outer chamber 18 and the inner chamber 17 of the steam valve and allow the steam to pass through the pipe 29, through the chamber 18 and chamber 17 and pipe 8O and through the passage 81 into the chamber 12 of the trap casing. At the same time water will pass from the T 56 through the nipple 59 into the chamber 46 in the vent valve 37 and pressing; against the diaphragm 40 will cause the member 41 to close the port 43, thus the vent valve will be closed and the steam valve will be opened so that passage of steam and air from the casing 11 through the passage 31 and outwardly through the vent valve by way of the outlet passage 48 therein will be stopped and steam will be admitted as before described throuo'h the same passage 31 and into the chamber 12 of the casing'. This operation of the steam trap occurs when the float 88 has arrived at a. predetermined position in its upward movement. the steam entering the casingv 11 as hereinbefore described. and the vent valve then beine; closed, the water which is in the casing` 11 will pass outwardly through the pipe 91 to a boiler, to which the pipe 91 is connected, it being understood that the trap will he positioned above the boiler in this case.

lll)

When the iioat has descended to nearly its lowermost position as the water passes out of the casing 1l, the pin 7 0 will engage the screw 87 in the extension 68 and move the valvestem 67 upwardly, together with the port 6G therein to the position illustrated in Fig. 1,thus closing the passage 63 against further admission of water under pressure and the spring 2'1 will then operate to close the steam valve, and the spring 45 will simultaneously operate to open the vent valve, thus the steam valve is closed and the vent valve opened so that the operation hereinbefore set forth may be repeated.

The shaft 72 and its bearings are to be made the subject-matter of another application.

I claim: i

l. A steam trap having, in combination, a casing provided with an inlet orilice and a discharge orifice, a steam valve connected by a passage into said casing, a vent valve connected to said passage through said steam valve, said steam and vent valves operable independently of each other, connections from said steam and vent valves to a source of fluid under pressure, a float in said chamber, and

means operated by said float to alternately admit said fluid to and shut oli" said fluid from said valves.

2. A steam trap having, in combination, a casing provided with an inlet orifice and a discharge orifice, a steam valve connected by a passage into said casing, a vent valve connected to said passage through said steam valve, said steam and vent valves operable in dependently of each other, connections from said steam and vent valves to a source of fluid under pressure, a float in said chamber, and means operated by said float to simultaneously admit said lluid to said valves.

3.I A steam trap having, in combination, a casing provided with an inlet orifice and a discharge orifice, a steam valve connected by a passage into sai (leasing, a spring operating to close said steam valve, a vent valve connected by a passage into said casing, a spring operating` to open said'vcut valve, connections from said steam and vent valves to a source of fluid under pressure said steam and vent valves operable independently of each other, a float in said casing, and means operated by said float to simultaneously admit said fluid under pressure to saidvalves to open `said steam valve and close said vent valve.

41. A steam trap having, in combination, a casing provided with an :inlet orifice and a discharge orifice, a steam valve connected by a passage into said casing, a spring' operating' to close said steam valve, a vent valve connected by a passage into said casing, a

spring operating to open said vent valve, connections from said steam and vent valves to a source of fluid under pressure, said steam and vent valves operable independently of' each other, a float in said easing, and means operated by said floatv to simultaneously shut ofl said fluid under pressure from said valves and allow said steam valve to be closed by its v spring and said vent valve to be opened by its spring.y

5. A steam trap having, in combination, a casing provided with an inlet orifice and a discharge orice, a vent valve and a steam valve connected by a passage into said casing', connections from said vent valveto a source of fluid under pressure, and connections from said steam valve to a source of iiuid under pressure, said steam and vent valves operable independently of each other, a shut-oil member in said connections, a float in said casing, and means connecting said lioat to said shutoli member whereby said fluid may be admitted to said valves to operate the same.

6. A steam trap having, in combination, a casing provided with an inlet orifice and a discharge orifice, a vent valve and a steam valveconnected by a passageinto said easing, connections from said valves to a source of fluid under pressure, a slide valve in said connections, a stem on said slide valve provided with a slot, a float in said casing, a rocker member to which said float is fastened, and a lpin onv said rocker member projecting into said slot, whereby a reciprocatory motion may be directly imparted to said slide valve by said rocker member at the end of each movement in. opposite directions respectively of the rocker member, whereby Y said fluid may be admitted to said valves to operate the same simultaneously, and may be shut ofi from said valves simultaneously.

- 7. A steam trap having, in combination, a casing provided with an inlet orifice and a discharge orifice, a veut valve connected by a passage into said casing, said vent valve embodying a diaphragm, a needle member fast thereto, and a springfacting normally to hold said valve open, connections'from said vent valve to a source of fluid under pressure, a slide valve in said connections,'a float in said casing, and a rocker member directly connecting said iioat to said slide valve, whereby said iluid may be admitted to the vent valve to close the same.

8. A steam trap having, in combination, a casing provided with an inlet orifice and a dischargeorifice, a steam valve connected to 4a passage `provided in the walls of said casing and leading'into the upper portion of said `casinga vent valve connected to said steam charge orifice, a steam valve connected by a4 passage into said casing, connections from said steam valve to a source of fluid:` under pressure, a slide valve positioned in said connections, a fioat in said casing, and a rocker member directly connecting said float to said slide valve whereby said fluid may be admitted to the steam valve to operate the same, said means embodying a rock shaft, an arm fixed thereto inside said casing to which said float is connected, another arm fast thereto outside said casing, and means directly connecting said last-named arm to said' slide valve, a shoulder on said rock shaft, a bea-,ring in which said shaft is loosely mounted", a washer on said shaft between the shoulder and bearing, and a spring actingto press said shoulder against said washer.V

l0. A steam t-rap having, in combination, a casing provided with an inlet orifice and a discharge orifice, a vent valve connected by a passage into said casing, connections from said vent valve to a source of fluid under pressure, said connections embodying therein two fluid passages oppositely disposed to each other, a slide valve provided with a port positioned in said connections and slidable transversely of'and between said passages, a float in said casing, and a rocker member directly connecting said float to said slide valve whereby saidfluid may be admitted to saidv vent valve to close the same, said rocker member embodying a rock shaft loosely mounted in bearings in said casing,

, said rock shaft being provided with a shoulder, one end of the bore of one of said' bearing members being closed, a washer positioned in a chamber provided in the other bearing member and' bearing against an end wall thereof, and means to force said shoulder against said washer.

11. A steam trap having, in combination, a casing provided with an inlet orifice and a discharge orifice, a vent valve connected by a passage into said casing, connections from positioned in said connections and slidabl'e transversely of and between said passages, a float in said casing, and a rocker member directly connecting said float to said slide valve whereby said fluid may be admitted to said vent valve to close the same, said rocker member embodying a rock shaft loosely mounted in bearings in said casing, said rock shaft being provided with a shoulder, one end of the bore of one of said bearing members being closed, a washer of composition material positioned in a chamber provided in the other bearing member and bearing against an end wall thereof, and means to force said shoulder against said washer.

l2. A steam trap having, in combination,

a casingprovided with an inletoriice and a discharge orifice, a vent valve connected by a passage into said casing, connections from saidvent valve to a source of fluid under pressure, said connections embodying therein. two fluidv passages oppositely disposed to each other, a slide valve provided with a port positioned in. said connections and slidable transversely of and between said passages, a float in said casing, and a rocher member directly connecting said float to said slide valve whereby said fluid may be admitted to saidA vent valve to close the same, said rocker member embodying a rock shaft loosely mounted in bearings in said casing, said rock shaft being provided with a shoulder, one end of the bore of one of said bearing members being closed, a washer of composition material positioned in a chamber provided in the other bearing member and bearing against an end wall thereof, and yielding means to force said shoulder against said washer.

13. A steam trap having, in combination.l a casing provided with an inlet orifice and a discharge orifice, a vent valve connected by al passage into said casing, connections from said vent valve to a source of fluid under pressure, said connections embodying therein two fluid passages oppositely disposed to each other, a slide valve provided with a port positioned in said connections and slidable transversely of and between said passages, a float in said casing, and a rocker member directly connecting said float to said slide valve whereby said fluid may be admitted to said vent valve or shut od therefrom, said rocker member embodying a rock shaft loosely mounted on bearing members in said casing spaced apart, one of said bearing members being provided with a chamber into one end of which said shaft projects, the other end ofl said chamber being closed, the other of said bearing members having a port therein to receive said shaft, and a second chamber adjacent the inner end of said port, a washer in said second chamber through which the shaft projects, and a spring in said first-named chamber bearing against said shaft and forcing the shoulder thereon against said washer.

14. A steam trap having, in combination, a casing provided with an inlet orifice and a discharge orifice, a vent valve connected by a passage into said casing, connections from said vent valve to a source of fluid under pressure, said connections embodying therein two fluid passa-ges oppositely d isposed to each other, a slide valve provided with a port positioned in said connections and slidable transversely of and between said passages, a float in said casing, a rocker member directly connecting said float to said slide valve whereby said fluid may be admitted to said vent valve or shut e'therefrom, said rocker member embodying a rock shaft loosely mounted on bearing members in said casing, spaced' apart one of said bearing members being provided with a chamber into one end of Which said shaft projects, the other end of said chamber being closed, the other of said bearing members having a port therein to receive said shaft, and a second chamber adjacent the inner end of said port, a Washer in said second chamber through which the shaft projects and a spring in said first-named chamber bearing against said shaft and forcing the shoulder thereon against said Washer, and a sleeve having screw-threaded engagement With the side Wall of said second chamber and bearing against said Washer, whereby the Washer may be forced against the end Wall of the second chamber.

In testimony whereof I have hereunto set my hand.

GEORGE BEZANSON. 

